Apply bookofjude's patch in [2837552] to fix "-um" pluralization issues.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@10566 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on August 18, 2009
TR6KNC3N4EXHAFJWYCQJ6QJOQRVVE5VJAMENA4DUZWE5XDGQQF4QC
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